7
513 01 3402 02
FIGURE 6
PH4E Suggested Rigging
ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.
PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.
50CY502286 2.0
CAUTION - NOTICE TO RIGGERS
PRUDENCE - AVIS AUX MANIPULATEUR
Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition
SEAL STRIP MUST BE IN
PLACE BEFORE PLACING
UNIT ON ROOF CURB
DUCTS
DETAIL A
VOIR DÉTAIL A
MINIMUM HEIGHT: 36" (914.4 mm)
HAUTEUR MINIMUM
UNIT HEIGHT
HAUTEUR D'UNITÉ
SEE DETAIL A
VOIR DÉTAIL A
BANDE SCELLANT DOIT ÊTRE
EN PLACE AVANT DE PLACER
L'UNITÉ SUR LA BASE DE TOIT
RIGGING WEIGHTS (SMALL CABINET)
RIGGING WEIGHTS (LARGE CABINET)
Unit
24
30
36
Unit
48
lb
kg
lb
kg
lb
kg
lb
kg
Rigging Weight
314
142.4
335
152.0
343
155.6
Rigging Weight
373
169.2
NOTE: See dimensional drawing for corner weight distribution.
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury or death.
When straps are taut, the clevis should be a minimum
of 36 in. (914 mm) above the unit top cover.
!
WARNING
Rigging/Lifting of Unit (See FIGURE 6)
Lifting holes are provided in base rails as shown.
1. Attach shackles, clevis pins, and straps to the base rails
of the unit. Be sure materials are rated to hold the weight
of the unit (See FIGURE 6).
2. Attach a clevis of sufficient strength in the middle of the
straps. Adjust the clevis location to ensure unit is lifted
level with the ground.
After the unit is placed on the roof curb or mounting pad, remove
the top skid.
Step 5 — Select and Install Ductwork
The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
non
−
residence type air conditioning and ventilating systems,
NFPA
90A or residence
−
type, NFPA 90B and/or local codes and
ordinances.
Select and size ductwork, supply
−
air registers, and return air
grilles
according to ASHRAE (American Society of Heating,
Refrigeration,
and Air Conditioning Engineers)
recommendations.
The unit has duct flanges on the supply
−
and return
−
air
openings on
the side of the unit.
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal
injury or death.
For vertical supply and return units, tools or parts could
drop
into ductwork Install a 90
degree turn in the
return ductwork between the unit and the
conditioned
space. If a 90 degree elbow cannot be installed,
then a
grille of sufficient strength and density should be
installed to prevent objects from falling into the
conditioned
space. Units with electric heaters require
90 degree elbow in
supply duct.
!
WARNING
When designing and installing ductwork, consider the following:
1. All units should have field
−
supplied filters or accessory
filter rack installed in the return
−
air side of the unit.
Recommended sizes for filters are shown in Table 1.
2. Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.
IMPORTANT
: Use flexible connectors between ductwork and
unit to prevent transmission of vibration. Use suitable gaskets to
ensure weather tight and airtight seal. When electric heat is
installed, use fireproof canvas (or similar heat resistant material)
connector between ductwork and unit discharge connection. If
flexible duct is used, insert a sheet metal sleeve inside duct.
Heat resistant duct connector (or sheet metal sleeve) must
extend 24
−
in. (610 mm) from electric heater element.
